Miriam Goldstein’s field guide prompted an important post from Danielle Lee, in which she shares her stories from the trenches of high school science fairs. Even if you’re not a scientist, I insist that you read this.

Does a doughnut = an apple? Does a calorie = a calorie? Does a whole rat = a blended rat? The answers to these questions and more in David’s fascinating write up of a AAAS meeting session on counting calories.